Neptune has the longest orbital period, which is equal to 59,800 Earth days. Pluto's is even longer (90,588 Earth days), but it has since been reclassified as a dwarf planet.
Mercury
If you mean revolution on it axis (spin/day length) rather than orbital period, then the answer is the planet Mercury, where time between sunrises is roughly 176 Earth days.
Neptune has the longest period of revolution among all planets in our solar system, taking about 165 Earth years to complete one orbit around the Sun.
The planet that has the shortest period of revolution is Mercury, which is 88 days. The planet with the longest revolution is Neptune, which is 165 years. Earth's revolution is the third shortest.
The revolution of a planet refers to the entire elliptical "race-track" path that it travels around the sun. Within our solar system, the time for the planets to complete one full revolution ranges from 88 Earth-days to 248 Earth-years. The time it takes for one of the Earth's revolutions around the sun is 1 year.
Neptune.
revolution
Technically, since Pluto is no longer a planet, but a dwarf planet, Uranus is the planet that takes the longest to orbit the sun.
Neptune travels the most distance per revolution around the Sun.
Neptune takes the longest as it is the farthest away.
Mercury is the shortest and Neptune is the longest
Mercury has the longest year in revolution among the inner planets, taking about 88 Earth days to complete one orbit around the Sun.
Mercury
If you mean revolution on it axis (spin/day length) rather than orbital period, then the answer is the planet Mercury, where time between sunrises is roughly 176 Earth days.
Pluto has the longest REVOLUTION period Venus has the longest ROTATION period
Neptune has the longest period of revolution among all planets in our solar system, taking about 165 Earth years to complete one orbit around the Sun.
The gas giant that has the longest revolution is the planet Neptune.